I know strjoin can be used to concatenate strings, like 'a' and 'b' but what if one of the strings is a variable, like
a=strcat('file',string(i),'.mat')
and I want:
strjoin({'rm',a})
MATLAB throws an error when I attempt this, and it's driving me crazy!
Error using strjoin (line 53) First input must be a string array or cell array of character vectors
1 Answer
What version of MATLAB are you using? What is the error? The first input to strjoin needs to be a cell array. Try strjoin({'rm'},a).
Also, before 17a, do:
a = strcat('file', num2str(i),'.mat')
In >=17a do:
a = "file" + i + ".mat";
Here is a performance comparison:
function profFunc
tic;
for i = 1:1E5
a = strcat('file', num2str(i),'.mat');
end
toc;
tic;
for i = 1:1E5
a = "file" + i + ".mat";
end
toc;
end
>> profFunc
Elapsed time is 6.623145 seconds.
Elapsed time is 0.179527 seconds.
